211

This number is a prime.

Emmanuel Vantieghem found a solved Sudoku containing 211 distinct primes in traditional word search format: up, down, forward, backward, or diagonal.

4  5  9  1  6  7  3  2  8
3  1  2  5  8  9  6  7  4
8  6  7  2  3  4  1  5  9
9  7  4  6  5  3  2  8  1
5  8  3  9  1  2  4  6  7
6  2  1  7  4  8  9  3  5
1  9  5  8  2  6  7  4  3
2  3  8  4  7  1  5  9  6
7  4  6  3  9  5  8  1  2

Is 211 the limit?